铁路运输企业应当加强对（）的安全教育和培训。
A.职工家属
B.沿线居民
C.工矿企业
D.从业人员
参考答案：D
-_______ did your uncle leave his hometown?
-He _______ for nearly twenty years.[ ]
A. When; has left
B. When; has been away
C. How long; has left
D. How long; has been away
老年病人硫喷妥钠静脉诱导易引起过量的原因主要是（）
A.血浆白蛋白减少
B.血容量减少
C.体内脂肪量减少
D.细胞外液量减少
E.细胞内液量减少
